(pick robot3 ball3 room2 lgripper3)
(pick robot3 ball4 room2 rgripper3)
(move robot3 room2 room1)
(drop robot3 ball3 room1 lgripper3)
(drop robot3 ball4 room1 rgripper3)
(pick robot4 ball1 room1 lgripper4)
(move robot4 room1 room2)
(drop robot4 ball1 room2 lgripper4)
; cost = 8 (unit cost)
